Sublattice magnetization and cation distribution in BaMg2Fe16O27(Mg2W) ferrite

Author

Albanese, Gianfranco ; Asti, Giovanni

Author_Institution

Istituto di Fisica delĺUniversità di Parma and Gruppo Nazionale di Struttura della Materia, Parma, Italy

Volume

6

Issue

2

fYear

1970

fDate

6/1/1970 12:00:00 AM

Firstpage

158

Lastpage

161

Abstract

Mössbauer measurements were carried out in compound BaMg2Fe16O27(Mg2W) by utilizing both polycrystalline and single-crystal samples. The resonant γ-absorption spectra have been measured with the absorbers at temperatures of 85 to 800°K and in some cases in the presence of a 15-kOe external magnetic field. The values of the hyperfine magnetic fields Hhfat the Fe⁵⁷nuclei in the different sublattices as functions of temperature have been measured. By fitting the curve of the saturation magnetization σ versus temperature, the cation distribution over the available lattice sites has been deduced. From the value of σ extrapolated at 0°K, it turns out that the number of Bohr magnetons $(n_{B})W$ per elementary cell is higher than the value obtained by adding the corresponding values for the $S$ and $M$ structures. The Curie temperature of the compounds has also been measured and is equal to (440 ± 5)°C.

Keywords

Magnesium ferrites; Magnetization processes; Curve fitting; Hafnium; Iron; Lattices; Magnetic field measurement; Magnetic resonance; Nuclear measurements; Saturation magnetization; Temperature distribution; Temperature measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1970.1066723

Filename

1066723